package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCDemo7 {
    public static void main(String[] args) {
        try(Connection connection = DBUtil.getConnection()) {
            String sql = "SELECT username,password,nickname FROM userinfo WHERE username=? AND password=?";
            PreparedStatement ps =connection.prepareStatement(sql);
            System.out.println("请输入用户名");
            Scanner scanner = new Scanner(System.in);
            String username = scanner.nextLine();
            System.out.println("请输入密码");
            String password = scanner.nextLine();
            ps.setString(1,username);
            ps.setString(2,password);
            ResultSet rs = ps.executeQuery();
            if(rs.next()){
                String nickname = rs.getString("nickname");
                System.out.println("欢迎回来"+nickname);
            }else {
                System.out.println("登录失败，用户名或密码错误");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
